Microstructure and Mechanical Properties of Silvergrass Fiber Cell Walls Evaluated by Nanoindentation

Authors

  • Chengbin Liao
  • Yuhe Deng
  • Siqun Wang
  • Yujie Meng
  • Xinzhou Wang
  • Ningsheng Wang

Keywords:

Cell wall, fiber, longitudinal tensile strength, mechanical properties, nanoindentation, silvergrass

Abstract

Silvergrass is a natural biological material with high mechanical strength and toughness and has potential as a raw material in wood-based composites. Structure and mechanical properties of fiber cell walls of silvergrass stalk in nanoscale were measured by nanoindentation. Silvergrass fiber cells have multilayered structure and diameter between 5 and 20 μm. Nanoscale mechanical tests showed that fibers of the upper stalk of silvergrass had better mechanical properties than those of the lower stalk and silvergrass fibers had better mechanical properties than wood fibers at the cell wall level. Macrohardness of the silvergrass stalk was 0.330 GPa evaluated from nanoindentation tests. Results found by nanoindentation were also verified by longitudinal tensile strength testing and particleboard manufacture.

References

China National Standard (1991) GB 1938-1991. Method of testing in tensile strength parallel to grain of wood. Standard Press of China, Beijing, China.nChina National Standard (1999) GB/T 17657-1999. Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels. Standard Press of China, Beijing, China.nChina National Standard (2003) GB/T 4897.3-2003. Particleboard-Part 3: Requirements for boards for interior fitments (including furniture) for use in dry conditions. Standard Press of China, Beijing, China.nGao HD, Cai WJ, Zhu DX, Deng YH, Sun J, Zou L (2009) Planting and utilization of silvergrass. Chinese Wild Plant Resources 28(3):65-67 [in Chinese with summary in English].nGuo GL, Chen WH, Chen WH, Men LC, Hwang WS (2008) Characterization of dilute acid pretreatment of silvergrass for ethanol production. Biores Technol 99 (14):6046-6053.nGuo GL, Hsu DC, Chen WH, Chen WH, Hwang WS (2009) Characterization of enzymatic saccharification for acid-pretreated lignocellulosic materials with different lignin composition. Enzyme Microb Technol 45(2):80-87.nHata S, Sawabe K, Natuhara YA (2010) A suitable embankment mowing strategy for habitat conservation of the harvest mouse. Landscape Ecol 6(1):133-142.nLiu L (1997) Flora Reipublicae Popularis Sinicae. Tomus 10(2). Science Press, Beijing, China. 21-26 pp [In Chinese].nLiu L, Zhu M, Zhu TP (2001) Exploitation and utilization of Miscanthus and Triarrhena. Journal of Natural Resources 16(6):562-563 [in Chinese with summary in English].nLow IM, Che ZY, Latella BA (2006) Mapping the structure, composition and mechanical properties of bamboo. Materials Research Society 21(8):1969-1976.nMa DJ, Ong CW, Wong SF (2005) Evaluation of macro-hardness from nanoindentation tests. J Mater Sci 40 (11/12):2685-2687.nOliver WC, Pharr GM (1992) An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J Mater Res 7(6):1564-1583.nSetunge S, Wong KK, Jollands M (2009) Economic and environmental benefits of using hardwood sawmill waste as a raw material for particleboard production. Water Air Soil Pollut Focus 9(5/6):485-494.nWu Y, Wang SQ, Zhou DG, Xing C, Zhang Y (2009) Use of nanoindentation and silviscan to determine the mechanical properties of 10 hardwood species. Wood Fiber Sci 41(1):64-73.nWu Y, Wang SQ, Zhou DG, Xing C, Zhang Y, Cai ZY (2010) Evaluation of elastic modulus and hardness of crop stalks cell walls by nano-indentation. Biores Technol 101(8):2867-2871.nYang ZD, Zhang X, Wan Y, Zhou CY (2009) Study on expand capability and soil reinforcement of silvergrass root system. Journal of Yangtze University 6(3):19-23 (Nat Sci Edit).nZhang Y, Lu X, Pizzi A, Delmotte L (2003) Wheat straw particleboard bonding improvements by enzyme pretreatment. Holz Roh Werkst 61(1):49-51.nZou LH, Jin H, Lu WY, Li XD (2009) Nanoscale structural and mechanical characterization of the cell wall of bamboo fibers. Materials Science and Engineering C: Materials for Biological Applications 29(4):1375-1379.n

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Published

2012-01-13

Issue

Number 1 / January 2012

Section

Research Contributions

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